Class: PresentationMaker

Inherits:
Wee::Component
  • Object
show all
Defined in:
lib/wee-pm/presentation_maker.rb

Constant Summary collapse

AREA_COLS = 
90
DEFAULT_CONVERTER = 
HtmlConverter

Instance Method Summary collapse

Constructor Details

#initialize(filename) ⇒ PresentationMaker

Returns a new instance of PresentationMaker.



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# File 'lib/wee-pm/presentation_maker.rb', line 9

def initialize(filename)
  super()
  @filename = filename
  @presentation = 
  if File.exists? @filename
    Presentation.from_string(File.read(@filename))
  else
    Presentation.new
  end

  if @presentation.slides.empty?
    @presentation.slides << Slide.new
  end

  @presentation.slides.each do |sl|
    sl.converter = DEFAULT_CONVERTER 
  end

  @edit_mode = false

  @show_title_page = true
end

Instance Method Details

#add_new_slide_after ⇒ Object 



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# File 'lib/wee-pm/presentation_maker.rb', line 104

def add_new_slide_after
  @current_slide_index += 1
  add_new_slide_before
end

#add_new_slide_before ⇒ Object

Actions: Edit



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# File 'lib/wee-pm/presentation_maker.rb', line 95

def add_new_slide_before
  index = @current_slide_index
  @presentation.slides[index,0] = Slide.new {|s| 
    s.title = @current_slide.title
    s.converter = DEFAULT_CONVERTER
  }
  select_slide(index)
end

#delete_current_slide ⇒ Object 



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# File 'lib/wee-pm/presentation_maker.rb', line 109

def delete_current_slide
  return if @presentation.slides.size <= 1
  @presentation.slides.delete_at(@current_slide_index)
  select_slide([@current_slide_index, @presentation.slides.size-1].min)
end

#move_current_slide_down ⇒ Object 



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# File 'lib/wee-pm/presentation_maker.rb', line 123

def move_current_slide_down
  sl = @presentation.slides
  ci = @current_slide_index
  return if ci >= sl.size-1
  sl[ci+1], sl[ci] = sl[ci], sl[ci+1]
  select_slide(ci+1)
end

#move_current_slide_up ⇒ Object 



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# File 'lib/wee-pm/presentation_maker.rb', line 115

def move_current_slide_up
  sl = @presentation.slides
  ci = @current_slide_index
  return if ci <= 0
  sl[ci-1], sl[ci] = sl[ci], sl[ci-1]
  select_slide(ci-1)
end

#next_slide_or_overlay ⇒ Object 



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# File 'lib/wee-pm/presentation_maker.rb', line 54

def next_slide_or_overlay
  if @show_title_page
    @show_title_page = false
    select_slide(0)
  elsif @current_overlay >= @current_slide.number_of_overlays
    if @current_slide_index < @presentation.slides.size-1
      select_slide(@current_slide_index + 1)
    else
      # TODO: show End-Box
    end
  else
    @current_overlay += 1
  end

  unless @step_mode 
    @current_overlay = @current_slide.number_of_overlays
  end
end

#prev_slide_or_overlay ⇒ Object 



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# File 'lib/wee-pm/presentation_maker.rb', line 73

def prev_slide_or_overlay
  # we are already on the first page -> do nothing!
  return if @show_title_page

  if @step_mode
    @current_overlay -= 1
    return if @current_overlay >= 0
  end

  @current_slide_index -= 1
  if @current_slide_index < 0
    show_title_page()
  else
    select_slide(@current_slide_index)
    @current_overlay = @current_slide.number_of_overlays 
  end
end

#render ⇒ Object

Rendering



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# File 'lib/wee-pm/presentation_maker.rb', line 147

def render
  r.html do
    r.head do
      r.title("Presentation Maker #{ @filename }")
      r.style(@presentation.style)
      if @current_slide
        r.style(@current_slide.style)
      end
    end

    body = r.body

    #if not @edit_mode
    #  body.onclick(javascript_action {||next_slide_or_overlay})
    #end

    body.with do

      if not @edit_mode
        page_down = r.url_for_callback(proc {
          next_slide_or_overlay()
        })
        page_up = r.url_for_callback(proc {
          prev_slide_or_overlay()
        })
        toggle_mode_url = r.url_for_callback(proc {
          toggle_mode()
        })
        toggle_step_mode_url = r.url_for_callback(proc {
          toggle_step_mode()
        })

        r << %{
          <script>
          document.onkeypress = function(ev) {
            switch (ev.keyCode) {
            case 101: /* 'e' */
              document.location.href='#{ toggle_mode_url }';
              return false;
            case 115: /* 's' */
              document.location.href='#{ toggle_step_mode_url }';
              return false;
            case 34: /* page down */
              document.location.href='#{ page_down }';
              return false;
            case 33: /* page up */
              document.location.href='#{ page_up }';
              return false;
            };
            return true;
          };
          </script>
        }
      end

      r.span.id("navibutton").with do 
        r.anchor.callback { toggle_mode }.with do
          r.space(2)
        end
      end
      render_body
    end
  end
end

#render_body ⇒ Object 



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# File 'lib/wee-pm/presentation_maker.rb', line 368

def render_body
  if not @edit_mode
    render_slide
  else
    r.table do
      r.table_row do

        r.table_data.valign('top').with do 
          render_navi
        end

        r.table_data.valign('top').with do
          render_slide
        end

      end
    end
  end
end

#render_navi ⇒ Object 



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# File 'lib/wee-pm/presentation_maker.rb', line 235

def render_navi
  r.div.id('naviframe').with do
    r.anchor.callback{toggle_mode}.with { r.text('Hide') }

    r.text(" | ")

    r.anchor.callback { toggle_step_mode }.with do
      r.text('Change into Full-Slide mode') if @step_mode
      r.text('Change into Step mode') if !@step_mode
    end

    r.text(" | ")
    r.anchor.callback{save_presentation}.with { r.text('Save presentation') }
    r.hr

    r.text("Presentation: ")
    if @show_title_page
      r.text(@presentation.title)
    else
      r.anchor.callback{show_title_page}.with { r.text(@presentation.title) }
    end
    r.break

    render_outline

    r.hr

    if @show_title_page
      render_title_edit
    else
      render_slide_edit
    end
  end
end

#render_outline ⇒ Object 



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# File 'lib/wee-pm/presentation_maker.rb', line 340

def render_outline
  r.ol {
    @presentation.slides.each_with_index do |slide, i|
      r.li do
        if i == @current_slide_index
          r.bold slide.title
          r.break

          (0 .. @current_slide.number_of_overlays).each do |j|
            if j == @current_overlay
              r.text "#{ j+1 }"
            else
              r.anchor.callback { @current_overlay = j }.with {
                r.text "#{ j+1 }"
              }
            end
            r.space
          end
        else
          r.anchor.callback { select_slide(i); show_all_overlays() }.with {
            r.text slide.title
          }
        end
      end
    end
  }
end

#render_slide ⇒ Object 



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# File 'lib/wee-pm/presentation_maker.rb', line 212

def render_slide
  if @show_title_page
    r.div.id('titlepage').css_class('slide').with do
      r.h1.onclick(javascript_action {||next_slide_or_overlay}).
        with(@presentation.title)

      r.div.id('author_email').with do
        r.text @presentation.author
        r.text(" (")
        r.anchor.href("mailto:#{ @presentation.email }").with(@presentation.email)
        r.text(")")
      end

    end
  elsif @current_slide
    r.div.id('slides').css_class('slide').  with do
      r.h1.onclick(javascript_action {||next_slide_or_overlay}).
        with(@current_slide.title)
      @current_slide.render_on(r, @current_overlay) 
    end
  end
end

#render_slide_edit ⇒ Object 



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# File 'lib/wee-pm/presentation_maker.rb', line 296

def render_slide_edit
  r.ul do 
    r.li {
      r.text('Add new slide ')
      r.anchor.callback{add_new_slide_before}.with { r.text('before') }; r.text(' / ')
      r.anchor.callback{add_new_slide_after}.with { r.text('after') }; r.space
      r.text('current')
    }
    r.li {
      r.text('Current slide: ')
      r.anchor.callback{move_current_slide_up}.with { r.text('move up') }; r.text(' / ')
      r.anchor.callback{move_current_slide_down}.with { r.text('move down') }; r.text(' / ')
      r.anchor.callback{delete_current_slide}.with { r.text('delete') }
    }
  end

  r.hr

  r.paragraph
  r.form do
    r.submit_button.value('Update').callback { @current_overlay = @current_slide.number_of_overlays }
    r.space

    r.text "Title: "
    r.text_input.size(35).callback {|c| @current_slide.title = c.to_s}.value(@current_slide.title)

    r.paragraph
    r.text_area.cols(AREA_COLS).rows(30).callback {|c| @current_slide.content = c.to_s}.with(@current_slide.content)

    r.paragraph
    r.text "Annotations:"
    r.break
    r.text_area.cols(AREA_COLS).rows(10).callback {|c| @current_slide.annotations = c.to_s}.
      with(@current_slide.annotations)

    r.paragraph
    r.text "Style:"
    r.break
    r.text_area.cols(AREA_COLS).rows(10).callback {|c| @current_slide.style = c.to_s}.
      with(@current_slide.style)

  end
end

#render_title_edit ⇒ Object 



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# File 'lib/wee-pm/presentation_maker.rb', line 270

def render_title_edit
  r.form do
    r.submit_button.value('Update')

    r.table.with do
      %w(title author email).each do |f| 
        r.table_row.with do
          r.table_data("#{ f.capitalize }: ")
          r.table_data.with {
            r.text_input.size(35).
              callback {|c| @presentation.send("#{ f }=", c.to_s) }.
              value(@presentation.send("#{ f }"))
          }
        end
      end
   end # table

   r.paragraph
   r.text("Style:")
   r.break
   r.text_area.cols(AREA_COLS).rows(10).callback {|c| @presentation.style = c.to_s}.
     with(@presentation.style)

  end
end

#save_presentation ⇒ Object 



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# File 'lib/wee-pm/presentation_maker.rb', line 131

def save_presentation
  @presentation.save(@filename)
end

#select_slide(index) ⇒ Object 



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# File 'lib/wee-pm/presentation_maker.rb', line 42

def select_slide(index)
  @show_title_page = false

  @current_slide_index = index
  @current_slide = @presentation.slides[@current_slide_index]
  @current_overlay = 0
end

#show_all_overlays ⇒ Object 



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# File 'lib/wee-pm/presentation_maker.rb', line 50

def show_all_overlays
  @current_overlay = @current_slide.number_of_overlays
end

#show_title_page ⇒ Object

Actions: Show



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# File 'lib/wee-pm/presentation_maker.rb', line 37

def show_title_page
  @show_title_page = true
  @current_slide_index = @current_slide = @current_overlay = nil
end

#toggle_mode ⇒ Object 



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# File 'lib/wee-pm/presentation_maker.rb', line 135

def toggle_mode
  @edit_mode = !@edit_mode
end

#toggle_step_mode ⇒ Object 



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# File 'lib/wee-pm/presentation_maker.rb', line 139

def toggle_step_mode
  @step_mode = !@step_mode
end